TUNABLE OPTICAL FILTER
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United States of America Patent
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Issued Date -
Apr 16, 2015
app pub date -
May 3, 2013
filing date -
May 4, 2012
priority date (Note) -
Abandoned
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Abstract
An apparatus for performing spectroscopy incorporates, between an EM source and a detector, an optical filter comprising a pair of mirrors opposed along the optical axis and shaped to provide an optical cavity with stable resonance and having a cavity length of at most 50 μm and a mode at a wavelength within said band of wavelengths for bandpass filtering EM radiation passing therethrough. The actuator system is arranged to move the mirrors relative to each other along the length of the optical cavity for tuning the wavelength of said mode.
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